Desk



FIG. 1 is a front elevational view of a desk;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left elevational view thereof;

FIG. 4 is a right elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front, right, top perspective view thereof.

The broken lines are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a desk, as shown and described. 